Ramarley Graham, 19, was hit once in the chest after an officer fired his gun during a confrontation in the Williamsbridge apartment. Graham was in the bathroom when he was shot once in the upper portion of his chest. No gun was found at the scene.

Graham was rushed to Montefiore Medical Center, where he later died.

“They chased him into the house,” said the teen’s mother, Constance Malcolm, 39, who witnessed the shooting. “Nobody deserves to be shot in their own home.”

According to the NY Daily News, moments before the shooting, officers from the NYPD’s Street Narcotics Enforcement Unit spotted Graham on the street adjusting his waistband and thought he had a gun, a police source said.

But Graham, who had at least two prior arrests for marijuana and burglary, ran when cops tried to approach him, the sources said.

Cops followed the teen as he dashed toward his second-floor apartment on E. 229th St., cops said. Once inside, Graham darted toward the bathroom with two cops behind him.

The teen tussled with a cop before the officer’s gun, a Sig Sauer .9-mm, went off and a bullet pierced Graham in the upper left chest, police said.

“He have some weed on with him,” said a family friend. “It wasn’t a big deal. They shot him inside the house. … He didn’t have a gun.”

Yesterday about 500 demonstrators attended a rally outside of Graham’s home where he was shot by cops last week and called for an end to police brutality.

Frank Graham, Ramarley’s father said:

“We are human beings. Stop treating us like animals. My son did nothing wrong. I want justice for my son, my baby.”

The cops involved in Graham’s death have been taken off the streets and given administrative duties while prosecutors investigate the shooting, according to a spokesman for the Bronx District Attorney.